Tire-casing spreader



J. P. SHEVLIN ET AL TIRE CAS ING SPREADER Filed Aug. 26. 1927 Patented Apr. 17, 1928.

UNITED STATES PATENT; OFFICE- JOSEPH P. SHEVLIN AND STUART E. NORTON, OF DENVER, COLORADO. v

TIRE-casina sranannn.

Application area August 2s, 1927. semi No. 215,721.'`

This invention relates to a tool for use 1n spreading the beads of an automobile tire casing so that the interior of the casing operated in the heaviest and most rigid ofv tire casings.

Another object ofv the invention is to provide a casing spreader which will automatically lock itself so as to lmaintain the casing in the spread condition.

ii 'further object is to so construct the spreader that it will be adjustable for diftering sizes of casings.

on the spreader which will cause it yto work Y into the casing so as to eliminate any pos sibility of its slipping therefrom.

Other objects and` advantages reside in the detail construction of the invention, which is designed for simplicity, economy and eiiiciency. These will become moreapparent from the following description.

1n the following detailed description of the invention, reference is had to the accompanying drauf'inglwhich forms a part hereof. Likenumerals refer to like parts in all views of the :drawing and throughout the description.

In the drawing:

Fin'. 1 is'` a perspective'view of a tire `casing illustrating the invention in position ready to he operated.

2 is a cross section through a tire casing illustrating the invention in the spread position.

Fig. 3 Ais an edge elevation of our im` proved tire casing spreader.

Fig. 4 is a detail view illustrating a cross section through the adjustable lug of the spreader.

Fig. 5 is a detail view of an alternate form of the conical spreading lug to be later described.

A pneumatic tire casing is illustrated at S with its beads at 9.

The invention comprises a handle from which an arcuate spreading lever 11 projects at an obtuse angle. `The lever 11 1s curved from the plane of the handle to approximately conform to the internal diarn eter of the tire casing. On the concave face of the curved lever 11, a series of trans,V

verse notches 12 are formed which act to determine the positions of an adjustable lug 13.

The adjustable lug 13 is shown in detail in Fig. 4t andv comprises a rectangular sleeve 14 adapt-ed to surround the lever. 11. Projecting inwardly from the sleeve 141 is a tongue 15 which 'engages in the notches 12. The passage in the sleevell tapers as indicated at 16,y so that the sleeve may be roclied uponl the lever 11 to `release the tongue 15 from the notches 12 so that it may be placed in any desired notch. The tongue is maintained in the notchI by a j plunger' 17 which is carried by the lug 13 and is constantly forced against the concave side of the lever 11 by means of a spring 18. A projection 19 on the extremity of the lever 11 prevents the lug 13 from being entirely removed. At the angle between the handle 10 and the lever 11, a conicalrotatable lug. 2O is carried on an axle pivot 21.

1n use, the tool is inserted in the casing 8, as shown in Fig; 1, with the lugs 13` and 20 extending into the space between the tvvov beads 9 of the casing. The handle 10 is then swung, ais-indicated by the arrow A,

Fig. 1, to the position of Fig 2. As the handle swings the conical lug Q0, will roll alongthe interior face of one of the casing beads until the handle 10 comes into contact with the casing as shown in Fig. 2. The casing beads are now spread apa-rt a distance equal to the original setting of the adjustable lug 13 soi that its interior may be readily inspected or repaired. f

It is desired to call attention to the fact i that the curve ofthe lever 11 is an important feature for, were the lever straight, it would be impossible to turn it, since its extremity would be between the casi ng beads and would not pass thereover as is necessary to assume the position of Fig. 2. It isy also desired to call attention to the fact that the obtuse angle between the handle 10 and the lever 11 is an important feature. This angle allows the tool to assume the position of Fig. 2, that is, with the lever resting beyndthe center point of rotation when the handle is in Contact with the casing. This causes the tool to be self-locking in the spread position. The tendency of the two beads is to press toward each other and, in so doing, they tend to swing the lever in a direction which only results in forcing the handle 1() more firmly against the casing without releasing the tool. v

In Fig. 5, we have shown an alternate forni for the conical lug. In this form, Wek

'Havinof thus described the invention whatA Z5 7 we claim vand desire to secure by Letters Patentv is j l. A tire casing` spreader comprising a handle; a lever jin'ojecting from said handie; an adjustable lug carried by said lever and longitudinally' movable thereon; means for locking` said lug :in a'predetermined positionon said lever; a second lug;` projecting from said handle, both' oi" said lugs adapted to be placed between the beads oi said casing, said means con'iprising a series of notches formed in one tace ot' said lever; a tongue Carried by said lug;r and adapted to engagesaid notches; and spring means arranged to maintain said tongue in said notches.

25A tire casing spreader comprising a handle; a lever proj eetingfrom said handle atan obtuse angle therewith, said lever being curved to approximate the interior curve of said tire casing; an adjustable lue; carried by said lever; al rotatable lue,r carried by said lever, said lugscadapted to extend between the beads ot said casing; and a thread formed on said .rotatable lue and adapted to work said lng;` toward said casingas said handle is swung.

3.111 a tire casing;T spreaderhaving lugs adapted to be inserted between the beads lof said casing and arranged so that they may be swung from a longitudinal position to a lateral position therein; an axlev for one ot said lugs soV that it may rotate thereabout; and a threadA formed on theexterior of said latter lug'to lcause it to work into said casing'.

4l. A tire easing spreader comprising a handle; a lever projecting from said handle; a lug projecting' adjacent the junction between said handle and said lever; a sleeve adapted to surround said lever; a second lug projecting;r from said sleeve, said sleeve being slidable'upon said lever, and means for locking said sleeve in predetermined positions upon said lever.

A tire casing spreader comprising a handle; a vlever projectingfrom said handle; a lug projecting` adjacent the junction between said handle and said lever; a sleeve. adapted to .surround said lever; a second lug;l projecting from said sleeve, said sleeve being sl'idable upon lsaid lever; .means 'for locking said sleeve in predetermined positions upon said lever.` and means on said lever for preventing` the movement of said sleeve.

6. A tire casing; spreader comprising a handle; a lever proj ecting:` lrom said handle; a lug' projecting'y adjacent the junction between said handlev and said lever; ay sleeve adapted to surround said lever g a second lug projecting vfrom saidsleeve; said sleeve being lslidable uponsaid lever; means tor locking;` said sleeve in predetermined positions upon said lever, the opening insaid sleeve ,tor thereception oi" said lever beingl larger at one extremity than at the other; a tongue projecting inwardly into the enlarged portion oil said opening notches in said lever adapted to receive said tongue and spring actuated means arranged to move said. sleeve on said lever so as to maintain said tongue in any desired one of said notches.

ln testimony' whereof; we aflix our signatures.

JOSEPH P. SHEVLIN. STUART E. NORTON. 

